Home / 721,648.09-1,083,310.71-422,343.47

Finding the Fourth Proportional to 721,648.09, 1,083,310.71 and 422,343.47

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Solution

The fourth proportional to 721,648.09, 1,083,310.71 and 422,343.47 is: 634,005.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,648.09 : 1,083,310.71 = 422,343.47 : x
  2. Step 2: Convert to fraction form
    721,648.09/1,083,310.71 = 422,343.47/x
  3. Step 3: Cross multiply
    721,648.09x = 1,083,310.71 × 422,343.47
  4. Step 4: Simplify right side
    721,648.09x = 457,529,199,380.43
  5. Step 5: Solve for x
    x = 457,529,199,380.43/721,648.09
  6. Step 6: Final answer
    x = 634,005.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.